content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * -----------------------
   * LineUtilitiesTests.java
   * -----------------------
   * (C) Copyright 2008, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 05-Nov-2008 : Version 1 (DG);
   *
   */
  
  package org.jfree.chart.util;
  
  import org.junit.Test;
  
  import java.awt.geom.Line2D;
  import java.awt.geom.Rectangle2D;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  
  
  /**
   * Tests for the {@link LineUtilities} class.
   */
  public class LineUtilitiesTest  {
  
  
  
  
  
      private boolean lineEquals(Line2D line, double x1, double y1, double x2,
              double y2) {
          boolean result = true;
          double epsilon = 0.0000000001;
          if (Math.abs(line.getX1() - x1) > epsilon) { result = false; }
          if (Math.abs(line.getY1() - y1) > epsilon) { result = false; }
          if (Math.abs(line.getX2() - x2) > epsilon) { result = false; }
          if (Math.abs(line.getY2() - y2) > epsilon) { result = false; }
  
          return result;
      }
  
      @Test
  
      public void testClipLine() {
          Rectangle2D rect = new Rectangle2D.Double(1.0, 1.0, 1.0, 1.0);
          Line2D line = new Line2D.Double();
  
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.0, 0.0, 0.0, 0.0));
  
          line.setLine(0.5, 0.5, 0.6, 0.6);
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.5, 0.5, 0.6, 0.6));
  
          line.setLine(0.5, 0.5, 1.6, 0.6);
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.5, 0.5, 1.6, 0.6));
  
          line.setLine(0.5, 0.5, 2.6, 0.6);
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.5, 0.5, 2.6, 0.6));
  
          line.setLine(0.5, 0.5, 0.6, 1.6);
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.5, 0.5, 0.6, 1.6));
  
          line.setLine(0.5, 0.5, 1.6, 1.6);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.0, 1.0, 1.6, 1.6));
  
          line.setLine(0.5, 0.5, 2.6, 1.6);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.4545454545454546, 1.0, 2.0,
                  1.2857142857142858));
  
          line.setLine(0.5, 0.5, 0.5, 2.6);
          assertFalse(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 0.5, 0.5, 0.5, 2.6));
  
          line.setLine(0.5, 0.5, 1.5, 2.6);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.0, 1.55, 1.2142857142857142, 2.0));
  
          line.setLine(0.5, 0.5, 2.5, 2.6);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.0, 1.025, 1.9285714285714284, 2.0));
  
          line.setLine(0.5, 0.5, 1.5, 1.5);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.0, 1.0, 1.5, 1.5));
  
          line.setLine(2.5, 1.0, 1.5, 1.5);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 2.0, 1.25, 1.5, 1.5));
  
          line.setLine(1.5, 1.5, 2.5, 1.0);
          assertTrue(LineUtilities.clipLine(line, rect));
          assertTrue(lineEquals(line, 1.5, 1.5, 2.0, 1.25));
      }
  
  }
  